hibernate: Disable when the kernel is locked down

There is currently no way to verify the resume image when returning
from hibernate.  This might compromise the signed modules trust model,
so until we can work with signed hibernate images we disable it when the
kernel is locked down.

Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: "Lee, Chun-Yi" <jlee@suse.com>
cc: linux-pm@vger.kernel.org

Gbp-Pq: Topic features/all/lockdown
Gbp-Pq: Name 0010-hibernate-Disable-when-the-kernel-is-locked-down.patch

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index cd7434e6000d90eb5be5a179ec6815e77b21201a..0f30de4a712afdfa1f5eeb26a915027152ad0311 100644 (file)
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -68,7 +68,7 @@ static const struct platform_hibernation_ops *hibernation_ops;
 
 bool hibernation_available(void)
 {
-       return (nohibernate == 0);
+       return nohibernate == 0 && !kernel_is_locked_down("Hibernation");
 }
 
 /**